Error Type
BPV
CRC (CRC framing only)
FAS
AIS
RAI
•
Highlight Line Error Rate and press ENTER to display
a sub-menu of available error types. Select the rate at
which errors are injected - these are shown in the
following table :
Error Rate
Single
2 in 5
DDS
DDS
1 in 1000
Continuous
DDS
DDS
2
Note
The error rates available depend on the error type you have
chosen.
•
Choose Inject Single or Start Injection (depending on
what is selected in Line Error Rate) from the BERT
Inject menu to start injecting errors.
•
Exit the sub-menus.
•
If you are injecting more than a single error, choose
Stop Injection to stop.
2
Note
The F5 function key toggles between Inject Single and
Start Injection depending on the Line Error Rate
selected.
Issue 1a - 10/99
Description
Injects a bi-polar violation error.
Injects a cyclic redundancy
error.
Injects a Frame Alignment
Signal error.
Injects Alarm Indication Signal errors.
Injects Remote Alarm Indication errors.
Description
Injects a single error.
Injects 2 errors in every 5 bits.
Injects 1 error in every 1000 bits.
Injects errors continuously.
Physical Testing
4-23